@article{IVM_1961_1_a1,
     author = {S. N. Andrianov},
     title = {Conditions for simultaneous orthogonality of functions and their derivatives in a complex region},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {21--26},
     year = {1961},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1961_1_a1/}
}